For decades, eyewitnesses have reported UFOs crashing to Earth all over the nation. Most are never found. Some believe crashed UFOs may contain alien technology that could change the course of history.

Many famous UFO sightings occur in remote locations with just a single eyewitness. But some sightings have taken place over large cities with hundreds of witnesses.

In 1947, a series of UFO sightings triggers an unprecedented analysis that propels the UFO phenomenon on to the world stage. We investigate how the U.S. Air Force comes to the stunning conclusion that UFOs may not be from Earth.

Millions of people believe extraterrestrial live on Earth. Are the aliens here to enlighten us or destroy us? What if the worst-case scenario happened? What would aliens do? And how would they do it?

Many UFO sightings are solitary events that leave witnesses scrambling to prove their story. But what happens when the same object is seen by many people at the same time? Join us as we expose the hidden secrets of The Kecksburg Incident.

Do aliens exist? And have they visited planet Earth? These are perhaps the most important questions of our time. For decades, eyewitnesses have come forward with unsettling stories of alien bodies recovered from crashed UFOs.

Rapid advancements in science and technology have given mankind unprecedented access to distant galaxies that could harbor life. And some scientists believe that to find alien life we need look no further than our own backyard.

An extraterrestrial threat. A top secret organization. Has the US made contact with aliens? Experts believe they have. And an ultra top secret organization is calling all the shots. Get ready for the untold story of Majestic 12.

Some UFO enthusiasts believe that all signs point to a massive global cover-up; the most active alien hotspots on Earth.

Photographic evidence of Unidentified Flying Objects helped usher in the modern UFO phenomenon. As the world continues to evolve into the digital age, more and more people are capturing images in the sky that they are unable to explain.

Signals from deep space. Mysterious crop circles. Messages hidden in the very building blocks of our planet. Recent evidence may reveal signs of alien life attempting to communicate. Are they goodwill ambassadors, or masters of war?

For decades, citizen UFOlogists have coordinated alien information-sharing networks, subverting the classified intelligence of their governments. What do these classified documents say about the way that our governments watch the skies?

Aborigines have the oldest continuous culture on Earth. Rock paintings and ancient legends suggest that aliens have been communicating with Australian Aborigines for 70,000 years. What are the Sky Being's relationship with these people?

Pyramids are found all over the world and from different time periods in human history. Did humans build the pyramids by themselves - or did they have help? Some experts believe pyramids across the world are part of a grand alien design.

As the Curiosity Rover searches Mars for signs of life, the questions becomes: Could Mars have been first? We'll explore the shocking possibility that sentient life began on Mars and traveled here.

The British government may know more about alien invasion than it is saying; military cover-ups; dire warnings from government insiders.

Each year, there are thousands of UFO sightings all over the world. What are these different kind of UFOs? What is each craft's purpose? What powers them and how they are controlled? And most importantly- who is flying them?

UFO sightings at Roswell and Area 51 are recalled.

There are structures as old as time that continue to baffle historians and engineers the world over. Did we build these ancient megaliths ourselves or did aliens guide our hand?

It's the ultimate close encounter. There have been thousands of reported cases all over the world. But these claims are almost invariably dismissed by authorities with little or no investigation.

The Soviet Union's vast skies paid witness to thousands of UFO sightings. But the Soviet regime was notorious for secrecy. Many of their encounters reported during the Cold War had potentially deadly consequences for the entire world.

UFOs. They can fly at blinding speed. Or hover effortlessly just a few feet above the ground. And they can do it all without making a sound. But how is this possible? The mysteries of anti-gravity propulsion are unsealed.

Humanity has been plagued by international conflicts and epic powers since the dawn of time. Perhaps our greatest failure is constant strife and division. Could an alien threat force humans to form a united front?

Everyday, UFOs are spotted in skies all over the world. But of all the planets in the known galaxy, why have they come to Earth? Are aliens here to seize Earth's riches? And how far does their mission go?

U.S. Presidents are the most powerful men on the planet. But do they know something about extraterrestrials that we don't? We'll explore the complex relationship between Aliens and Presidents.

Some scientists believe the survival of mankind hinges upon the revolutionary science of Artificial Intelligence. Biological life may just be an evolutionary stepping-stone in a universe dominated by Artificial Alien Intelligence.

Nearly three hundred million people worldwide claim to have been abducted by aliens. Many report being subjected to torturous medical experiments. Others return with unwelcome reminders of their ordeal. Are aliens creating human hybrids?

Many believe aliens are already here on Earth. But why are they here? Are aliens planning an all-out attack on planet Earth? And if they are, is there any way we can fight back?

Between 1981 and 2011, NASA's Space Shuttles flew 135 missions. The Space Shuttle cameras, manned and unmanned, have recorded astounding footage of UFOs that many experts find almost impossible to explain.

Every day, millions take to the sky in commercial flights all over the world. But decades of evidence have revealed we may not be the world's only frequent flyers. Are we in danger of losing control of our skies to extraterrestrial beings?

The flying saucer. For decades it's been synonymous with UFO terror. But millions of reported encounters tell a very different story. From Cold War showdowns to telepathic terrors, join is as we track the rise of Black Triangles.

For decades, UFO researchers have demanded that the government reveals what is knows about UFOs. Who will make the announcement? When will they do it? And what will it mean for the very bedrock institutions of society?

A mysterious book, "The Blue Planet Project" has surfaced, outlining decades of cooperation between the U.S. military and alien forces on earth as well as a massive government cover-up to hide these visitors from the world.

UFO sightings happen almost every day. But in the court of public opinion the most credible witnesses come from law enforcement. Join us as we investigate the most important police sightings of UFOs.

Do visitors to planet Earth come from some far off galaxy? Traveling vast distances to the only planet boasting intelligent life in this corner of space. We investigate the shocking secrets of alien civilizations in our solar system.

Experts have long believed the universe to be riddled with mysterious portals - shortcuts through space that allow travelers to span vast distances in the blink of an eye. From mighty volcanoes to secret underground civilizations.

In 1969, the U.S. government officially announces it will stop investigating UFOs, but declassified documents reveal that multiple government agencies have been hiding important UFO sightings for decades.

It can happen to anyone at anytime; a close encounter with a UFO. Citizens all over the world have been reporting incidents with alarming increase. We are counting down the top ten civilian close encounters of all time.

Some experts believe many atmospheric light shows are actually caused by extraterrestrials. Do they pose an imminent threat to humanity? Join us as the alien secrets behind atmospheric anomalies.

Aliens have been trying to make contact with mankind for millennia. Now for the first time, one of those messages has been decoded and we will share that message with the world.

Encountering life from another world can be a terrifying and deadly experience. Abductees claim to have been captured and experimented on. Join us as we confront the truth about alien encounters.

Scientists have never been closer to proving that life once lived on Mars. But is it still there? And if so, how has it evolved? Join us as we investigate the red planet and the possibility that alien life may live within our own galaxy.

Since the early 1960s, we've experimented with how to travel off planet Earth. Many experts believe America has operated a secret Space Force for decades, with ultra high-tech ships designed for missions beyond Earth's orbit.

Close encounters. There's no telling where or when they will happen. But of all the possible scenarios, none is more terrifying than the one we're unaware of - until it's too late.

Details from art works, miraculous visions and Vatican investigations and archives are used to support a theory that the Roman Catholic Church has concealed its knowledge of extraterrestrial life.

Our world is changing. Temperatures are climbing. Ocean levels are rising. Giant storms are becoming more frequent and intense. Super-viruses are thriving in this new environment. At the same time, alien activity is also on the rise.

Our world is home to many UFO hot spots, where unidentified objects are reported with alarming regularity. But a select few locations have something extra. They're notorious for strange paranormal phenomenon to extraterrestrial activity.

Nations all over the world are rumored to have recovered metal debris from these UFO crashes. From self-healing hulls to sinister alien implants, join is as the secrets of UFO metals are UNSEALED.

Many experts believe aliens have visited the Earth for thousands of years, but if we can't survive space travel without a protective suit, how can they? Are some aliens mere shells or clones with an artificial consciousness?

Allegedly altered space photos and missing NASA recordings are examined to determine whether alien life exists.